Results 21 to 30 of about 17,929 (222)

SN 2003du: Signatures of the Circumstellar Environment in a Normal Type Ia Supernova? [PDF]

, 2003
We present observations of the Type Ia supernova 2003du and report the detectionof an unusual, high-velocity component in the Ca II infrared triplet, similar tofeatures previously observed in SN 2000cx and SN 2001el.
Bradley E. Schaefer, Castelli F., Christopher L. Gerardy, Chugai N. N., Cumming R., Fisher A., G. H. Marion, Greiner J., Hoflich P., J. Craig Wheeler, Ken’ichi Nomoto, Khokhlov A., Khokhlov A., Lifan Wang, Peter Hoflich, Robert A. Fesen, Robert Quimby, van den Heuvel E. P. J.   +17 more
core   +4 more sources

SN 2020bio: A Double-peaked, H-poor Type IIb Supernova with Evidence of Circumstellar Interaction

The Astrophysical Journal, 2023
We present photometric and spectroscopic observations of SN 2020bio, a double-peaked Type IIb supernova (SN) discovered within a day of explosion, primarily obtained by Las Cumbres Observatory and Swift.
C. Pellegrino, D. Hiramatsu, I. Arcavi, D. A. Howell, K. A. Bostroem, P. J. Brown, J. Burke, N. Elias-Rosa, K. Itagaki, H. Kaneda, C. McCully, M. Modjaz, E. Padilla Gonzalez, T. A. Pritchard, N. Yesmin   +14 more
doaj   +1 more source

Problems of modelization of circumstellar matter out of equilibrium [PDF]

Symposium - International Astronomical Union, 1994
Circumstellar envelopes of young and evolved stars are responsible for many important phenomena concerning the exchange of matter, angular momentum, energy and maybe magnetic field between the core structure of stars and the interstellar medium. In particular, it is through them that matter enriched in heavy elements flows from evolved stars towards ...
J-P. J. Lafon, E. Huguet
openaire   +1 more source

The XMM-Newton/INTEGRAL monitoring campaign of IGR J16318-4848 [PDF]

, 2006
IGR J16318-4848 is the prototype and one of the more extreme examples of the new class of highly obscured Galactic X-ray sources discovered by INTEGRAL.
A. Ibarra, Anders, E. Jiménez-Bailón, E. Kuulkers, F. Nicastro, Filliatre, G. Matt, George, Goldwurm, Hynes, J. Rodriguez, Kuulkers, Leahy, Lebrun, M. Guainazzi, Matt, Matt, Matt, Molendi, Negueruela, Piconcelli, R. Walter, Revnivtsev, Rodriguez, Strüder, Sunyaev, Ubertini, Walter, Watanabe, Winkler   +29 more
core   +2 more sources

Radiative Acceleration of Dense Circumstellar Material in Interacting Supernovae

The Astrophysical Journal, 2023
Early-time light curves/spectra of some hydrogen-rich supernovae (SNe) provide solid evidence of the existence of confined, dense circumstellar matter (CSM) surrounding dying massive stars. We numerically and analytically study the radiative acceleration
Daichi Tsuna, Kohta Murase, Takashi J. Moriya   +2 more
doaj   +1 more source

A Tidally-Disrupted Asteroid Around the White Dwarf G29-38 [PDF]

, 2003
The infrared excess around the white dwarf G29-38 can be explained by emission from an opaque flat ring of dust with an inner radius 0.14 of the radius of the Sun and an outer radius approximately equal to the Sun's.
Koester D., M. Jura, Michalak G., Nicholson P., Ossenkopf V., Vauclair G.   +5 more
core   +3 more sources

Bipolar outflows as a repulsive gravitational phenomenon -- Azimuthally Symmetric Theory of Gravitation (II) [PDF]

, 2010
This paper is part of a series on the Azimuthally Symmetric Theory of Gravitation (ASTG) which is built on Laplace-Poisson's well known equation. We show herein that the emergent equations from the ASTG, under some critical conditions determined by the ...
Nyambuya, G. G.
core   +1 more source

The ALMA survey to Resolve exoKuiper belt Substructures (ARKS)

Astronomy & Astrophysics
Context. Asymmetries in debris discs provide unique clues to understand the evolution and architecture of planetary systems. Previous studies of debris discs at (sub)millimetre wavelengths have suggested the presence of asymmetries in a wide variety of ...
Lovell J. B., Hales A. S., Kennedy G. M., Marino S., Olofsson J., Hughes A. M., Mansell E., Matthews B. C., Pearce T. D., Sefilian A. A., Wilner D. J., Zawadzki B., Booth M., Bonduelle M., Brennan A., del Burgo C., Carpenter J. M., Cataldi G., Chiang E., Fehr A., Han Y., Henning Th., Krivov A. V., Luppe P., Marshall J. P., Mac Manamon S., Milli J., Moór A., Wyatt M. C., Ertel S., Jankovic M. R., Kóspál Á., MacGregor M. A., Matrà L., Pérez S., Weber P.   +35 more
doaj   +3 more sources

An X-Ray Spectroscopic Study of the SMC X-1/Sk 160 System

, 1999
We have investigated the composition and distribution of the wind of Sk 160, the supergiant companion of the X-ray star SMC X-1, by comparing an X-ray spectrum of the source, obtained with the ASCA observatory, during an eclipse with the computed spectra
Ebisawa K., George W. Clark, Kudritzki R. P., Orr A., Patrick S. Wojdowski, Pauldrach A., Sato N., Timothy R. Kallman   +7 more
core   +1 more source

Angular Momentum Exchange by Gravitational Torques and Infall in the Circumbinary Disk of the Protostellar System L1551 NE [PDF]

, 2014
We report the ALMA observation of the Class I binary protostellar system L1551 NE in the 0.9-mm continuum, C18O (3-2), and 13CO (3-2) lines at a ~1.6 times higher resolution and a ~6 times higher sensitivity than those of our previous SMA observations ...
Hanawa, Tomoyuki, Ho, Paul T. P., Lim, Jeremy, Matsumoto, Tomoaki, Saigo, Kazuya, Saito, Masao, Takakuwa, Shigehisa   +6 more
core   +2 more sources